I blocked a lot of social media sites on my home network to help ease my addiction some. Especially Reddit. I found the mornings I was on Reddit before getting out of bed my mood suffered. I still need to have them available to communicate with some people and for research. But now, in order to use those sites, I either need to leave the house or disconnect from the wifi.
Functionally, this seems to have helped a lot and usually the only time I end up on social media is when I am killing time waiting while out or when I really really want to look at something specific, and only on my mobile device. It seems that making it slightly more inconvenient worked on me without me having to give them up entirely.